Single Sided Rigid Flex PCB Board With HASL Immersion Gold Surface Finishing

Professional Customized High Quality FPC Rigid Flexible PCB circuit Board Single-sided flex PCB

What is a Rigid Flex PCB?

Stiffeners are most commonly manufactured from either FR4 or polyimide.

FR4 is cost effective and typically used to support component areas, due to its higher rigidity than polyimide. Thicknesses vary from 0.008” to 0.059” or greater.

Polyimide is used for increasing the thickness at, and providing support for, ZIF connector contact fingers. It allows for the tight tolerance of the flex thickness and part outline at the contacts as called out by the connector specifications. Typically, at the finger area, flex thickness tolerance is +/- 0.002” and outline width is +/- 0.003”. Polyimide is also used to limit bend capabilities in specific areas to facilitate installation in the final assembly, reinforce mounting hole locations and provide added wear resistance if there is an abrasion concern.

Stiffeners can also be manufactured from aluminum or stainless steel as well as other materials. Aluminum is commonly used for designs that require heat dissipation. Stainless steel is used when the design has space limitations on the stiffener thickness and a higher level of support is required than what an FR4 stiffener of the same thickness can provide. Both materials are added cost factors, can extend delivery times, and may have minimum order quantity requirements.

Materials: Rigid-Flex PCB
Rigid-flex circuit boards utilize the same materials as rigid PCBs and flex circuits but differ in the type of pre-preg used. The pre-preg required has a reduced flow capability and is referred to as either “no-flow” or “low- flow”. It is the same material as standard full flow pre-preg but is cured to a higher level prior to use in lamination. This increased cure state prevents the pre-preg from being extruded out between layers and onto the surface of the interconnecting flex sections. If allowed to occur, this would violate IPC-6013 specifications and result in a finished part that is non-functional or that is easily broken when bent. The necessary low-flow format of the pre-preg is not available in all types of rigid materials. It’s reduced flow characteristics also require a thicker amount to ensure a proper lamination.

YS Rigid Flex PCB manufacturing capabilities overview

FQA

1. What are the minimum and maximum thickness of your adhesive flex PCBs?
Minimum thickness is 2 µm and the maximum is 200 µm.
We ensure high chemical durability and processing compatibility for flexible printed circuits and do not sacrifice its original electrical property, heat-resistant property, and mechanical property.

2. Which IPC standards do you follow?
IPC Standards for Rigid and Flexible PCBs
The list of IPC standards below applies to rigid PCBs and flex circuits. Take note that this list is not exhaustive, and additional IPC standards may need to be considered.
You should consult the ipc.org website for a full list of available IPC standards.

IPC-2221A, Generic Standard on Printed Board Design
IPC-2223, Sectional Design Standard for Flexible Printed Boards
IPC-4101, Specification for Base Materials for Rigid and Multilayer Printed Boards
IPC-4202, Flexible Base Dielectrics for Use in Flexible Printed Circuitry
IPC-4203, Adhesive Coated Dielectric Films for Use as Cover Sheets for Flexible Printed Circuitry and Flexible Adhesive Bonding Films
IPC-4204, Flexible Metal-Clad Dielectrics for Use in Fabrication of Flexible Printed CircuitryIPC-6013, Qualification and Performance Specification for Flexible Printed Wiring

3. What is the function of the flexible circuit board?
The functions of flexible circuit boards can be divided into four types: Lead Line, Printed Circuit, Connector, and Integration of Function.
The use covers computers and computer peripherals—auxiliary systems, consumer electrical appliances, automobiles, etc.
After the circuit is completed with single-sided PI copper-clad material, it is covered with a protective film to form a flexible circuit board with only a single-layer conductor.

4. Rigid-flex PCB vs. rigid PCBs and flexible PCB, What are the differences?
As the name suggests, rigid-flex PCB is a mixture of rigid and flexible PCBs.
Rigid-flex PCBs combine the excellent qualities of both while eliminating many of their limitations.
Rigid-flex PCBs combine flex circuit design with rigid materials.

By layering the flexible PCB board inside the rigid printed circuit board material, the versatility of the flexible printed circuit is finally combined with the stability, strength, and circuit wiring density of the rigid printed circuit board.
This mixing opens possibilities for more complex and mechanically challenging rigid-flex PCB designs.

Rigid-flex PCB simplifies the electronic design by eliminating flexible cables, connectors, and discrete wiring.
Its electrical performance has been enhanced compared to its counterparts because the circuit is an integral part of the overall structure.
All electrical and mechanical connections are contained in the rigid-flex PCB, providing electronic designers with greatly improved service reliability and electrical performance.

Although the cost of rigid-flex PCBs is usually higher than flexible PCBs and rigid PCBs.
However, rigid-flex PCBs’ reliability, weight reduction, strength, and space-saving advantages are generally ideal in specific applications and are superior to any other electronic packaging technology.
Ultimately, rigid-flex PCB provides the best benefits of rigid PCBs and flexible PCBs in one solution.

5. How you work with YScircuit?
Step 1: Place your order and our enginner will review the Gerber and comforming you with the EQ, and then, the production will start.
Step 2: Quality check and arrange the shipping by courier.